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What is the value of positive two-digit integer x?

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by Vincen » Fri Sep 29, 2017 7:11 pm
What is the value of positive two-digit integer x?

(1) The sum of the two digits is 5.
(2) x is prime.

The OA is E.

I thought that the answer should be C. We can see that x=23 satisfy both statements. Any expert could help me here?
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Source: — Data Sufficiency |
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by GMATGuruNY » Sat Sep 30, 2017 3:05 am
Vincen wrote:What is the value of positive two-digit integer x?

(1) The sum of the two digits is 5.
(2) x is prime.
Statements combined:
It's possible that x=23 or that x=41.
Since x can be different values, the two statements combined are INSUFFICIENT.

The correct answer is E.
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